Meet Five Lethal American Converts to Islam

John Georgelas, the Texas-born son of a U.S. Air Force doctor and grandson of a World War II veteran, now calls himself Yahya Abu Hassan. He has reportedly just become one of the top leaders of the Islamic State (ISIS).

Georgelas is not by any means the only convert to Islam to have gotten the idea that his new religion, though touted as peaceful by almost all American authorities, actually commands him to commit treason and mass murder.

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